27th November 2016, 23:40
Ubuntu officially in the xenial repo does not provide the 4.8 kernel yet. That explains the problems you experience with the virtualbox packages in the repo.
When ubuntu updates the kernel in the repo or at least provides it they will definitely also update the virtualbox dkms packages to a version compatible with that kernel (most probably in xenial-backports)
When ubuntu updates the kernel in the repo or at least provides it they will definitely also update the virtualbox dkms packages to a version compatible with that kernel (most probably in xenial-backports)